中国地理科学 ›› 2016, Vol. 26 ›› Issue (4): 495-507.doi: 10.1007/s11769-015-0763-0

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Effects of Aluminum Toxicity Induced by Acid Deposition on Pine Forest Ecosystem in Longli of Guizhou Province, Southwestern China

ZHANG Jing1, LYU Zhipeng2, SHAO Siya1, LI Fangfang1, YANG Shengtian2, SONG Wenlong2, LI Wei3, LI Shunjiang3   

  1. 1. College of Global Change and Earth System Sciences, Beijing Normal University, Beijing 100875, China;
    2. School of Geography, Beijing Normal University, Beijing 100875, China;
    3. School of Environment, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2014-01-08 修回日期:2014-04-25 出版日期:2016-08-27 发布日期:2016-06-21
  • 通讯作者: ZHANG Jing E-mail:jingzhang@bnu.edu.cn
  • 基金资助:

    Under the auspices of National Basic Research Program of China (No. 2010CB951802, 2005CB422207), Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-219), National High Technology Research and Development Program of China (No. 2009AA122104)

Effects of Aluminum Toxicity Induced by Acid Deposition on Pine Forest Ecosystem in Longli of Guizhou Province, Southwestern China

ZHANG Jing1, LYU Zhipeng2, SHAO Siya1, LI Fangfang1, YANG Shengtian2, SONG Wenlong2, LI Wei3, LI Shunjiang3   

  1. 1. College of Global Change and Earth System Sciences, Beijing Normal University, Beijing 100875, China;
    2. School of Geography, Beijing Normal University, Beijing 100875, China;
    3. School of Environment, Beijing Normal University, Beijing 100875, China
  • Received:2014-01-08 Revised:2014-04-25 Online:2016-08-27 Published:2016-06-21
  • Contact: ZHANG Jing E-mail:jingzhang@bnu.edu.cn
  • Supported by:

    Under the auspices of National Basic Research Program of China (No. 2010CB951802, 2005CB422207), Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-219), National High Technology Research and Development Program of China (No. 2009AA122104)

摘要:

The effects of acid deposition on pine forest ecosystems in Longli of Guizhou Province, southwestern China are studied using indoor experiments and model simulations. Indoor experiments are designed to explore the aluminum toxicity on pine seedlings, and the long-term soil acidification model (LTSAM) and a terrestrial biogeochemistry model (CENTURY) are used to simulate the influences of acid deposition on pine forest ecosystems. The indoor experiment results of aluminum toxicity show that aluminum ions in solution limit plant growth and acid deposition enhances this effect by facilitating the release of aluminum ions from the soil. Pine seedling biomass and root elongation decrease as the aluminum concentration increases. The results of model simulations show that the soil chemistry varies significantly with different changes in acid deposition. When the acid deposition increases, the pH value in the soil solution decreases and the soil Al3+ concentration increases. The increased acid deposition also has negative impacts on the forest ecosystem, i.e., decreases plant biomass, net primary productivity (NPP) and net CO2 uptake. As a result, the soil organic carbon (SOC) decreases because of the limited supply of decomposition material. Thus acid deposition need be reduced to help protect the forest ecosystems.

关键词: acid deposition, aluminum toxicity, long-term soil acidification model (LTSAM), terrestrial biogeochemistry model (CENTURY), pine forest

Abstract:

The effects of acid deposition on pine forest ecosystems in Longli of Guizhou Province, southwestern China are studied using indoor experiments and model simulations. Indoor experiments are designed to explore the aluminum toxicity on pine seedlings, and the long-term soil acidification model (LTSAM) and a terrestrial biogeochemistry model (CENTURY) are used to simulate the influences of acid deposition on pine forest ecosystems. The indoor experiment results of aluminum toxicity show that aluminum ions in solution limit plant growth and acid deposition enhances this effect by facilitating the release of aluminum ions from the soil. Pine seedling biomass and root elongation decrease as the aluminum concentration increases. The results of model simulations show that the soil chemistry varies significantly with different changes in acid deposition. When the acid deposition increases, the pH value in the soil solution decreases and the soil Al3+ concentration increases. The increased acid deposition also has negative impacts on the forest ecosystem, i.e., decreases plant biomass, net primary productivity (NPP) and net CO2 uptake. As a result, the soil organic carbon (SOC) decreases because of the limited supply of decomposition material. Thus acid deposition need be reduced to help protect the forest ecosystems.

Key words: acid deposition, aluminum toxicity, long-term soil acidification model (LTSAM), terrestrial biogeochemistry model (CENTURY), pine forest